<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			.box {
				width: 200px;
				height: 200px;
				border: 1px solid red;

				/* writing-mode 属性定义了文本在水平或垂直方向上如何排布。 兼容性上还有些小瑕疵，但大部分浏览器已经支持 */
				writing-mode: vertical-lr;
				text-align: center;
			}

			.children-box {
				background: yellow;

				writing-mode: horizontal-tb;
				display: inline-block;
				text-align: center;
				width: 100%;
			}

			/* 	.box>.children-box>p {
				display: inline-block;
				margin: auto;
				text-align: left;
				background: yellow;
			} */
		</style>

	</head>
	<body>
		<div id="app">
			<div class="box">
				<div class="children-box">111111</div>
			</div>
		</div>
	</body>
</html>
